This is the last model in the Canon's first SLR camera series (the first model of which was introduced in 1959).
The camera body's design was renewed on this model from the ones previously released that it employed the film wind lever instead of the film wind trigger, and incorporated built-in selenium exposure meter coupling with shutter dial for the first time.

Various new technologies were incorporated into Flex series, and one of them was the automatic diaphragm mechanism called "Super Canomatic".
This is what a sequence of aperture setting is made machanically that aperture is automatically set to a preset aperture value by winding the film, and then sectors in the lens starts setting to the preset by releasing the shutter. It was said that this mechanism works the fastest of all then. And the camera employs breech-lock mount instead of screw-in mount. And this after all provides a high optical accuracy since friction between the lens and the lens mount does not occur, and the lens mount isn't worn out.

Well then, let's take a look at it.

• First introduced in 1962.
• Camera type : 35mm focal-plane shutter SLR camera
• Picture size : 24 x 36mm
• Standard lens : R 58mm f/1.2, R 50mm f/1.8
• Exposure meter : built-in selenium exposure meter coupling with shutter dial
• Metering range (at ISO 100) : EV 6 - 17
• Film speed range : ISO 10 - 800
• Shutter : two-axis horizontal-run focal plane shutter with cloth curtain
• Shutter speeds : B, X, 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500, 1/1000 sec., Shutter button lock provided.
• Self-Timer : built in.
• Flash sync contact : FP, X (automatic switching contact, X-sync speed of 1/55 sec., bayonet terminal socket on camera side.)
• Frame counter : automatic resetting forward counting frame counter, 1.5x magnifier provided.
• Film wind : recessed film wind lever (120 deg. single stroke)
• Rewind : collapsible rewind crank
• Body dimensions : 145 x 92 x 47mm
• Body weight : 680 g.